Food is contained in the gastrointestinal tract from the time of ingestion until It is completely digested and the waste prepared for elimination.

True

The circular folds of the small intestine enhance absorption by causing the chyme to spiral, rather than move in a straight line, as it passes through the small intestine.

True

As food passes through the digestive tract, it becomes less complex and the nutrients are more readily available to the body.

True

Some of the microbes that often invade other organs of the body are rarely found in the stomach. The reason for this is the presence of HCI.

True

Kupffer cells are found in the liver and are responsible for removing bacteria and worn-out cells.

True

The pharyngeal-esophageal phase of swallowing is involuntary and is controlled by the swallowing center in the thalamus and lower pons.

False

All the chemical ad mechanical phases of digestion from the mouth through the small intestine are directed toward changing food into forms tha can pass through the epithelial cells lining the mucosa into the underlying blood and lymphatic tissue

True

Pepsinogen is the precursor to the gastric enzyme for protein digestion and is secreted by the parietal cells.

False

The main chemical activity of the stomach is to begin the digestion of proteins.

True

The major role of absorption in the ileum is to reclaim bile salts to be recycled back to the liver.

True

The peritoneum is the most extensive serous membrane in the body.

True

Peyers patches are found in the submucosa of the distal end of the small intestine.

True

The myenteric nerve plexus provides the major nerve supply to the GI tract wall and controls GI motility.

Tre

The first teeth to appear are the deciduous teeth.

True

Dentin anchors the tooth in place.

False

The digestive function of the liver is to produce bile.

True

The pancreas has both an endocrine and an exocrine function

True

Another term for swallowing is deglutition.

True

The intrinsic ability of visceral smooth muscle to exhibit the stress-relaxation response is termed plasticity.

True

The stomachs contractile rhythm is set by pacemaker cells found in the spinal cord.

False

The major stimulus for production of intestinal fluid is distension or irritation of the intestinal mucosa by hypertonic or acidic chyme.

True

Most nutrients are absorbed through the mucosa of the intestinal villi by active transport.

True

Ionic iron is actively transported into the mucosal cells, where it binds to the protein ferritin, a phenomenon called the mucosal ion barrier.

True

Mumps is an inflammation of the parotid glands caused by myxovirus.

True

Fats significantly delay the emptying of the stomach

True

The soft palate rises reflexively to open the nasopharynx when we swallow food.

False